function dlCheck(){
if (document.dform.User_User.value == ''){
alert('请填写用户名称！');
document.dform.User_User.focus();
return false;
}
if (document.dform.User_Pass.value == ''){
alert('请填入登陆密码！');
document.dform.User_Pass.focus();
return false;
}
return true;
}

document.write ('<div id=maindl><form name="dform" method="post" action="dl_Pass.Asp?url=" onsubmit="return dlCheck();"><ul>')
document.write ('<li>用户名： <input name="User_User" type="text" id="User_User" size="11" maxlength="20" class=input1></li>')
document.write ('<li>密&nbsp; 码： <input name="User_Pass" type="password" id="User_Pass" size="11" maxlength="20" class=input1></li>')
document.write ('<li style="padding-top:10px;"><input name="imageField" type="image" src="Skins/Images/dl_01.gif" width="60" height="21" border="0">&nbsp;&nbsp;<a href="reg.Asp"><img src="Skins/Images/reg_01.gif" width="60" height="21" border="0"></a></li>')
document.write ('</ul></form></div>')